Mark’s gospel is a fast paced book designed to teach one thing. Jesus is God the Son, the promised Savior. The works Jesus did, the miracles He performed, all prove on thing. He is God. He is Savior.
Mark 1:1
The beginning of the gospel of Jesus Christ, the Son of God;
Jesus is proven to be God the Son, the promised Savior, by the prophecy he fullfilled. The Old Testament book of Malachi foretold that a messenger would prepare the way for the promised One. John the Baptist was the promised messenger who prepared the way for Jesus the promised Savior.
Mark 1:2-8
As it is written in the prophets, Behold, I send my messenger before thy face, which shall prepare thy way before thee. The voice of one crying in the wilderness, Prepare ye the way of the Lord, make his paths straight.John did baptize in the wilderness, and preach the baptism of repentance for the remission of sins. And there went out unto him all the land of Judaea, and they of Jerusalem, and were all baptized of him in the river of Jordan, confessing their sins. And John was clothed with camel’s hair, and with a girdle of a skin about his loins; and he did eat locusts and wild honey; And preached, saying, There cometh one mightier than I after me, the latchet of whose shoes I am not worthy to stoop down and unloose. I indeed have baptized you with water: but he shall baptize you with the Holy Ghost.
The teaching that Jesus is Divine did not come from the imagination of the disciples or the teachings of the church. God taught the disciples that Jesus is God. When Jesus was baptized, God the Father announced to everyone present that Jesus is God the Son.
Mark 1:9-11
And it came to pass in those days, that Jesus came from Nazareth of Galilee, and was baptized of John in Jordan. And straightway coming up out of the water, he saw the heavens opened, and the Spirit like a dove descending upon him: And there came a voice from heaven, saying, Thou art my beloved Son, in whom I am well pleased.